OWL DL OWL DL ( Description Logic) is a sublanguage of OWL Full that restricts application of the constructors from oWL and rDF Application of oWL's constructors to each other is disallowed Therefore it corresponds to a well studied description logic OWL DL permits efficient reasoning support o But we lose full compatibility with RDF Not every RDF document is a legal OWL DL document Every legal oWL DL document is a legal RDF document 15 Chapter 4 A Semantic Web primerChapter 4 A Semantic Web Primer 15 OWL DL ⚫ OWL DL (Description Logic) is a sublanguage of OWL Full that restricts application of the constructors from OWL and RDF – Application of OWL’s constructors’ to each other is disallowed – Therefore it corresponds to a well studied description logic ⚫ OWL DL permits efficient reasoning support ⚫ But we lose full compatibility with RDF: – Not every RDF document is a legal OWL DL document. – Every legal OWL DL document is a legal RDF document